有空中晕厥史飞行员微循环的特征及其可能的影响

目的 探讨微循环与空中晕厥发生的关系。方法试验对象为39名有空中晕厥文的飞行员并设对照健康组飞行员46人。两组飞行员均作常规主动立位耐力试验，试验前后测量血压、心率和微循环各项指标。结果 两组立位耐力试验后，晕厥组多项指标与对照组差异明显，特别是管拌数目、心率、收缩压、血管长度、拌顶宽度、输入枝、输出枝直径等(P＜0．05)。而多数变化从立位即刻开始至立位后20min持续加深而血压进一步下降。结论 微循环的变化与易发空中晕厥有关系，改善微循环对预防和矫治空中晕厥可能有意义。

Characteristic of microcirculation in pilots with history of syncope in the air and its possible influence

Objective To explore the relationship between charactristic of microcirculation and proneness to syncope so as to improve the prevention and treatment of syncope in the air. Methods Thirty nine pilots with history of syncope in the air served as subjects, and 46 healthy pilots as controls. In both groups, the routine orthostatic tolerance test (OTT) was performed. Blood pressure, heart rate and microcirculation were observed before and during the test. Results During OTT, the differences of several microcirculation indexes between two groups became significant immediately after turning to erect position, and the change of some indexes became more obvious 20 min after turning to erect position( P <0.05), accompanied by further lowering of blood pressure. Conclusions Ability of microcirculation adjustment during OTT appeared to be closely related with proneness to syncope. Measures enhancing microcirculation adjustment should be adopted and further verified.